All of you people that make fun: I bet you didn't know that things like playing an instrument and SOLVING PUZZLES helps keep your mind going so you can almost guarantee your self protection from Alzheimer's :) So were are you with that logic? :)
you can get a excel spreadsheet that fills automatically the cells as you enter the data
at jean.david.free.fr/sudoku-crible.xls
next you do the rest
enjoy